package com.atguigu.educenter.controller;

import com.atguigu.commonutils.JwtUtils;
import com.atguigu.educenter.pojo.UcenterMember;
import com.atguigu.educenter.service.UcenterMemberService;
import com.atguigu.educenter.utils.ContantWxUtils;
import com.atguigu.educenter.utils.HttpClientUtils;
import com.atguigu.servicebase.exceptionhandler.GuliException;
import com.google.gson.Gson;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.HashMap;

@CrossOrigin
@Controller  //只是请求地址，不需要返回数据
@RequestMapping("/api/ucenter/wx")
public class WxApiController {
    @Autowired
    private UcenterMemberService memberService;
    @GetMapping("callback")
    public String callback(String code,String state){
        //1 获取code值，临时票据，类似于验证码
        //2 拿着code请求 微信固定的地址，得到两个值 accsess_token 和 openid
        String baseAccessTokenUrl = "https://api.weixin.qq.com/sns/oauth2/access_token" +
                "?appid=%s" +
                "&secret=%s" +
                "&code=%s" +
                "&grant_type=authorization_code";
        //拼接三个参数
        String acessTokenUrl = String.format(baseAccessTokenUrl,
                ContantWxUtils.WX_OPEN_APP_ID,
                ContantWxUtils.WX_OPEN_APP_SECRET,
                code
        );

        //请求拼接好的地址
        //使用httpclient发送请求

        try {
            String acessTokenInfo = HttpClientUtils.get(acessTokenUrl);

            System.out.println(acessTokenInfo);
            //把acessTokenInfo字符串转换成map集合，根据map获取值
            //使用json
            Gson gson = new Gson();
            HashMap mapAccessToken = gson.fromJson(acessTokenInfo, HashMap.class);
            String access_token =(String) mapAccessToken.get("access_token");
            String openid = (String) mapAccessToken.get("openid");



            //扫码人信息添加到数据库
            //判断数据库表是否存在相同的信息
            UcenterMember member =  memberService.getOpenIdMember(openid);
            if (member == null){//如果是空的就进行添加
                //固定地址
                String baseUserInfoUrl = "https://api.weixin.qq.com/sns/userinfo" +
                        "?access_token=%s" +
                        "&openid=%s";
                //拼接两个参数
                String userInfoUrl = String.format(baseUserInfoUrl,
                        access_token,
                        openid);
                //发送请求
                String userInfo = HttpClientUtils.get(userInfoUrl);
                System.out.println(userInfo);
                Gson gson1 = new Gson();
                HashMap UserInfoMap = gson1.fromJson(userInfo, HashMap.class);
                String nickname =(String) UserInfoMap.get("nickname");
                String headimgurl =(String) UserInfoMap.get("headimgurl");
                //需要添加
                member = new UcenterMember();
                member.setOpenid(openid);
                member.setNickname(nickname);
                member.setAvatar(headimgurl);

                memberService.save(member);
            }
            //最后返回首页面
            //使用jwt根据据member生成token字符串
            String jwtToken = JwtUtils.getJwtToken(member.getId(), member.getNickname());


            return "redirect:http://localhost:3000?token="+jwtToken;
        } catch (Exception e) {
            throw new GuliException(20001,"登陆失败");
        }
        
    }

    //1.生成微信扫描的二维码
    @GetMapping("login")
    public String getWxCode(){

        //获取扫描人的信息，添加数据
        // 微信开放平台授权baseUrl  %s相当于?代表占位符
        String baseUrl = "https://open.weixin.qq.com/connect/qrconnect" +
                "?appid=%s" +
                "&redirect_uri=%s" +
                "&response_type=code" +
                "&scope=snsapi_login" +
                "&state=%s" +
                "#wechat_redirect";

        //编码
        String redirectUrl = ContantWxUtils.WX_OPEN_REDIRECT_URL;
        try {
            redirectUrl = URLEncoder.encode(redirectUrl, "utf-8");
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }

        String url = String.format(
                baseUrl, ContantWxUtils.WX_OPEN_APP_ID,
                redirectUrl,
                "atguigu"
        );


        return "redirect:"+url;
    }


}
